CN201134782Y

CN201134782Y - Speed regulating system of generator

Info

Publication number: CN201134782Y
Application number: CNU2007201708605U
Authority: CN
Inventors: 龙逸; 刘建伟; 首召兵
Original assignee: Shenzhen H&T Intelligent Control Co Ltd
Current assignee: Shenzhen H&T Intelligent Control Co Ltd
Priority date: 2007-11-16
Filing date: 2007-11-16
Publication date: 2008-10-15
Anticipated expiration: 2017-11-16

Abstract

The utility model relates to a motor speed-regulating system. The system comprises an MCU, a single-pole double-throw relay and a resistance capacitance voltage reducing circuit, wherein a first pole of the single-pole double-throw relay which is arranged on an input end of a motor is connected with the motor, a second pole is connected with the resistance capacitance voltage reducing circuit and then is connected with the motor, and the MCU drives a contact of the single-pole double-throw relay to switch between the first pole and the second pole. A motor speed-regulating circuit of the utility model is simple and can realize that one speed is changed into two speeds without changing the motor and parameters of the motor at all, two grade speed regulation which is realized through using resistance capacitance voltage reduction is safe and reliable and can not produce any disturbance to the circuit, furthermore, the two grade speed regulating system has low cost and is in particular applied in various small electric appliances with high demands for cost consideration.

Description

Motor speed regulation system

Technical field

The utility model relates to electric machine speed regulation, more particularly, relates to a kind of simple motor two-stage governing system.

Background technology

Generally in motor application, all can need to carry out electric machine speed regulation.Usually, the available technology adopting controllable silicon is realized electric machine speed regulation.According to the silicon controlled operation principle, change the silicon controlled conducting state by different electric impulse signals, just can realize stepless time adjustment to motor.But, thyristor speed control circuit more complicated, cost is also very high.And controllable silicon is a kind of interference source, can introduce bigger interference to circuit during conducting.For example for the motor that only need obtain two kinds of rotating speeds, too complicated and cost height is not optimal selection to thyristor speed control because of it for some equipment.

The utility model content

The technical problems to be solved in the utility model is that the deficiency that goes up at prior art provides a kind of simple motor two-stage governing system.

The technical scheme that its technical problem that solves the utility model adopts is: a kind of motor speed regulation system is provided, comprise MCU, single-pole double throw relay and resistance-capacitance depressurization circuit, being arranged on first of described single-pole double throw relay on the motor power input circuit extremely directly is connected with motor, be connected with motor behind second utmost point series connection resistance-capacitance depressurization circuit, switch between described first utmost point and second utmost point contact that MCU drives described single-pole double throw relay.

In the above-mentioned motor speed regulation system, the relay of described MCU drives mouth and is connected with the base stage of triode, the transmitter ground connection of triode, and collector electrode inserts the input circuit of described single-pole double throw relay.

In the above-mentioned motor speed regulation system, also be provided with second relay of controlling it and opening/close by MCU on the described motor power input circuit.

Implement motor speed regulation system of the present utility model, have following beneficial effect: this motor speed regulation system circuit is simple, not needing that motor and parameter thereof are done any change just can realize becoming two kinds of speed by a kind of speed, and the two-stage speed governing that utilizes resistance-capacitance depressurization to realize is safe and reliable, can not produce any interference to circuit.And two-stage governing system cost of the present utility model is low, is particularly useful for the demanding various compact electric apparatus equipment of cost consideration.

Description of drawings

Fig. 1 is the hardware block diagram of the utility model motor speed regulation system;

Fig. 2 is the circuit diagram of an embodiment of the utility model motor speed regulation system;

Fig. 3 is the control flow chart of MCU in the utility model motor speed regulation system.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples:

The utility model is to utilize resistance-capacitance depressurization that motor is carried out a kind of realization of speed governing, and as shown in Figure 1, the alignment circuit 14 that is arranged on the power supply input circuit of motor 12 is controlled by MCU 16.Alignment circuit 14 mainly is made of single-pole double throw relay and resistance-capacitance depressurization circuit, and first of single-pole double throw relay extremely directly connects motor, and second utmost point of single-pole double throw relay is connected with motor behind the resistance-capacitance depressurization circuit.Under the driving of MUC16, the contact of single-pole double throw relay can be switched between first utmost point and second utmost point.When the contact of single-pole double throw relay connects first utmost point, connect the conventional power supply input circuit of motor, motor is to run up; When the contact of single-pole double throw relay connects second utmost point, just in the conventional power supply input circuit of motor, introduce the resistance-capacitance depressurization circuit of series connection, reduce electric moter voltage, make motor with low-speed running.The single-pole double throw relay switches between first utmost point and second utmost point under MCU 16 drives, and can realize that just motor is switching at a high speed and between the low speed, thereby realize the two-stage speed governing.

Specifically as shown in Figure 2, be the circuit diagram of an embodiment of the utility model motor speed regulation system.Single-pole double throw relay R Y103 is arranged on the power supply input circuit of motor, and its A utmost point (normal-closed end) directly is connected with motor, and its B utmost point (Chang Kaiduan) connects the resistance-capacitance depressurization circuit, is connected to motor behind the resistance-capacitance depressurization circuit.As shown in Figure 2, the resistance-capacitance depressurization circuit is made of capacitor C 110 and resistance R 106 parallel connections.Single-pole double throw relay R Y103 is driven by single-chip microcomputer U101, and as shown in Figure 2, the driving mouth PB0 of single-chip microcomputer U101 is connected with the base stage of triode TR102, the transmitter ground connection of triode TR102, and collector electrode inserts the input circuit of single-pole double throw relay R Y103.

When motor initially powered on, the A utmost point (normal-closed end) of relay R Y103 was connected the conventional power supply input circuit of motor, and motor is to run up.Herein, also can increase a relay again and control when motor initially powers on and do not move, and drive this relay with power supply input circuit closure motor by MCU.

When needing the motor low-speed running, single-chip microcomputer U101 drives a mouthful PB5 with its relay and puts height, thereby make triode TR102 conducting, relay R Y103 adhesive, its contact switches to the B utmost point (Chang Kaiduan), the resistance-capacitance depressurization circuit is inserted in the power supply input circuit of motor, make the motor input voltage reduce, realize low-speed running.Need switch to when running up from low speed, single-chip microcomputer U101 drives a mouthful PB5 with its relay and puts low, thereby triode TR102 is ended, relay R Y103 outage, its contact is back to the A utmost point (normal-closed end), disconnect the resistance-capacitance depressurization circuit, make the motor input voltage recover normal, realize running up.By utilizing single-pole double throw relay and resistance-capacitance depressurization circuit, the utility model can realize that just motor is switching at a high speed and between the low speed.

Fig. 3 is the control flow chart of MCU among the embodiment of the utility model motor speed regulation system, and is specific as follows:

Step 302, MCU starts working;

Step 304, the various variablees of MCU initialization;

Step 306, MCU judges whether that according in advance setting or outside instruction etc. needs make the motor low-speed running;

If determining in the step 306 does not need the motor low-speed running, then keep normal high-speed cruising state, enter end step 310;

If determine in the step 306 to make the motor low-speed running, in the step 308, MCU puts height with the relay driving mouth of correspondence, thereby makes the relay adhesive, inserts the resistance-capacitance depressurization circuit to reduce electric moter voltage in the motor power input circuit, realizes low-speed running;

Step 310, end operation.

Further, MCU can for example regularly expire etc. according to certain condition, with relay drive mouth put low, thereby the relay outage disconnects the resistance-capacitance depressurization circuit, motor is returned to normally run up.

Claims

1, a kind of motor speed regulation system, it is characterized in that, comprise MCU, single-pole double throw relay and resistance-capacitance depressurization circuit, being arranged on first of described single-pole double throw relay on the motor power input circuit extremely directly is connected with motor, be connected with motor behind second utmost point series connection resistance-capacitance depressurization circuit, switch between described first utmost point and second utmost point contact that MCU drives described single-pole double throw relay.

2, motor speed regulation system according to claim 1 is characterized in that, the relay of described MCU drives mouth and is connected with the base stage of triode, the transmitter ground connection of triode, and collector electrode inserts the input circuit of described single-pole double throw relay.

3, motor speed regulation system according to claim 1 is characterized in that, also is provided with second relay of being controlled it and being opened/close by MCU on the described motor power input circuit.